Process of coating with metals.



" rmrrnn snitrns PA orrrcE CARL H. Z IEME, OF NEW CASTLE, PENNSYLVANIA,ASSIGNOR OF ONE-THIRD TO GEORGE L. PATTERSON ONE-SIXTH TO WILLIAM R.KINNEAR, AND ONE-SIXTH 'IO CHARLES W. J OHN SON, ALL OF NEW CASTLE,PENNSYLVANIA.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed March a, 1908. Serial N 0. 419,170.

To all whom it may concern: 1

Be it known that I, CARL H. ZIEME, a citizen of the United States,residing at New Castle, in the county of Lawrence and State ofPennsylvania, have invented a certain new and useful Process of Coatingwith Metals, of which the following is a specification.

My invention relates to coating metallic objects or materials, such forinstance, as iron and steel with a metal or combination of metals of acharacter suitable to resist external influences.

In an application filed November 4, 1907, (Serial No. 400,456), in thename of George L. Patterson, Thomas L. Mornes and myself, a process isdescribed, for galvanizing, which consists in applying to the surface tobe coated, a liqui slip, the mixture containing partially oxidized zincin finely divided form and then inclosing the metal thus coated, in asuitable receptacle in which it can be sub jected to heat at between600. and 1000 Fahrenheit; this process causing the zinc to form upon themetal a closely adhesive and substantially amalgamated coating of veryhigh character, resembling a coating formed by electrolysis, but morefirmly bound to the underlying metal.

In U. S. .Letters Patent No. 701,298, granted June 3, 1902, toCowper-Coles, is described a process of coating metals by heating themetal to be coated to a temperature corresponding to the dull red heatof iron in the presence of pulverulent zinc partially oxidized, saidpatent also alluding to the a plicationof zinc alloy in place of thezinc a one, it being explained that when metallic coating material isused, a certain proportion of oxid must be present and that this iseffected by adding oxid of zinc or submitting the metallic zinc tooxidizing influences.

According to my present invention, I deposit two or more metalssimultaneously upon a metallic surface to be coated, by making a slip orcoating containing oxids of said metals mechanically mixed with asuitable vehicle preferably consisting of an inert substance and afluid, and I then subject the me tallic body thus coated to the actionof heat at from 600 to l000 Fahrenheit, and there- "by reduce thecoating to the several metals which have united with the metallicsurface in their metallic state and a residuum con- .so as to form acoating thereon.

sisting mainly of the inert element of the vehicle which can be readilybrushed away.

For an illustrative process, though I desire it to be understood that myinvention is not limited to specific proportions or other details, Itake a metallic body to be surfacedfor instance, a sheet of iron orsteeland I clean the same, as for instance by a pickling bath. I preparea slip or bath consisting of 90% of the metallic oxid element and 10% ofan inert substance such for instance as finely divided clay suitable tomix with the metallic element and keep it in suspension, together withenough Water to make a pasty bath. The metallic oxid element consists ofmechanically fixed oxids of the several metals that it .is desired tosimultaneously deposit upon the metal, for instance, the oxid of zinctogether with the oxid of tin (stanni'c oxid) and the oxid of lead(litharge or minium) and the oxid of any other suitable surfacing oralloying metal, these being in the proportions of 95% of zinc (zincdust) and 5% of either of the metallic oxids or any combination thereof.I then dip the metallic sheet or other object in the slip, if both sidesare to be coated, or otherwise bring into contact with the slip thatportion of the metallic article that is to be surfaced, I then take thearticle and either after or before drying the coating, I subject it tothe action of heat at between 600 and 1000 Fahrenheit, preferably underconditions which exclude free alr. allowed to cool, when it will befound that the several metals will have been deposited in metallicstate, making an evenly distributed homogeneous and amorphous surfacewhich is firmly bound to the underlying metal throughout a in a mannerto permit working the metal without separation of the surface deposited.

My process is obviously quite different from one in which a previouslyprepared alloy of metals is em loyed and applied in the presence of ameta lic oxid or of oxidizing influences,- for the reason that eachmetal to be deposited is partially oxidized in advance to the de reesuitable to insure its proper action in t' e process; moreover, it is byno means certain that the oXid of one metal is suitable for depositing adifferent metal.

I do not limit myself to the preparation of After the heating step, theobject is following is what I claim as new therein mixture of themetallic substance inthe proa sli by the use of an inert substance. Some1 oxi s may be found to be suitable for a plication Without the use ofan inpalpable inert substance to hold the oxid in suspension.

- Having thus described my invention, the

1. The process of surfacing a metal with a plurality of other metals,one of which is zinc, which consists in providing a mixture of themetals to be de osited, of which the zinc is in partially oxi ized formand the remainder in the form of oxid, then applyin the mixture to themetal to be surfaced an then heating the whole to a degree suflicient todeposit the surfacing metals in metallic state.

2. The process of surfacing metals with a plurality of other metals oneof which is zinc, which consists in providing the metals to be depositedin oxidized form in proportions of which the zinc is largely in excess,applying a" portions selected, to the metal to! be suraced, and heatingthe latter to a suitable temperature to cause the metals to be depositedin metallic state.

3. The process of surfacing a metal with a plurality of other metals oneof which is zinc,

which consists in providing a mixture of the l metals in oxidized form'with the oxidized zinc in the proportion of about 95%, applying saidmixture to the metal to be surfaced, and then heating the Whole to atemperature sufficient to deposit the surfacing metals in metallicstate.

4. The process of surfacing a metal with a plurality of other metalswhich consists in orming a slip consisting of about 90% of the metals tobe deposited, in oxidized form, about 10% of a finely divided inertsubstance and a suitable liquid, then applying the slip to the metal tobe surfaced and subjecting the whole to heat suificient to deposit thesurfacing metals in metallic state.

5. The process of surfacing a metal with other metals by heating thesame inthe presence of a slip consisting of a suitable iquid, 10% of afinely divided inert substance and 90% of a mixture of the metals to bedeposited, made up of about 95% of partially oxidized zinc and about 5%of other metallic oxide.

The" foregoing specification signed at New York, N. Y. this 26 day ofDec., 1907.

CARL H. ZIEME. In presence of two witnesses Gus A. ME ER, PmLrP J.BACHMANN.

